The best replacement for motion sensor is claymore black ops.

The best alternatives to motion sensor are rated as following:
★★★★★  claymore black ops
★★★  jammer
★★★  glass break
★★★  claymore
★★★  g sensor
★★  jammer black ops
★★  occupancy sensor
★★  accelerometer
★★  camera spike
★  proximity sensor
★  glass breakage
  window sensor

Your alternative for motion sensor is not listed? Suggest!
Speaking about motion sensor, one probably shouldn't forget about chime.

Other search terms related to motion sensor and their ratings are:
★★★★★ chime
★★★★ dimmer
★★ light
★ siren
photocell
camera wireless
photo cell
You have in mind a companion for motion sensor and it is not yet here? Propose!



Google Trends

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motion sensor
claymore black ops
jammer